49. They are going to      (visit) the Summer Palace next Monday.

48. Lily      (stay) with me tomorrow.

47. The students      (have) a meeting next weekend.

46. I won't      (be) free tomorrow.

45. Can you      (改变) for your families,John?

44. The      (交通) is very busy in the morn- ing in our city.

43. There are many      (机器人) working in the factory.

42. My English        (水平) will be better soon.

41. Students' bags are      (重的) now.

Here is a page from a magazine called Future. Read the following information about things that may happen in twenty years.

Cars will run on solar power (太阳能）and will be much cleaner and safer. For example,if you are too close to another car or if you are driving danger?ously,your car will slow down or stop by itself.

New cities will have to be built in the sea. Some cities on water will have two levels (层) . People will live on the upper level,and the lower level will be used for traffic,shops and factories.

Biotechnology (生物技术) will make food better and healthier. Plants without insects or illnesses (病虫害) will be developed. The taste of fruit and vege?tables will be better and food will be kept longer.

Many new ways to cure (治愈) illnesses will be found. People will use products of genetic engineer?ing (基因产品) to cure more illnesses. However,some new illnesses will appear.

根据短文内容，完成下列表格。